<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="contaner">我是div</div>
    <button>点击</button>
    <script>
        // 一、innerHTML:可以替换元素的超文本内容 
        // 1.获取元素 2.操作元素；
        var contanerEle = document.getElementsByClassName("contaner")[0];
        var btn = document.getElementsByTagName("button")[0];
        btn.onclick = function () {
            // contanerEle.innerHTML = "<h1>我是替换的内容</h1>";
            // var name = "张三";
            // contanerEle.innerHTML = "<p>我的名字是"+name+"</p>";

            // 1.通过数组 循环出html结构填充到页面里面
            // var arr = ["张三","李四","王五"];
            // var htmlstr = "<ul>";
            // for(var i=0;i<arr.length;i++){
            //     htmlstr += "<li>我的名字是"+arr[i]+"</li>";
            // }
            // htmlstr += "</ul>";
            // console.log(htmlstr);
            // contanerEle.innerHTML = htmlstr;

            // 2.通过对象数组 来替换 html元素里的内容；
            var arr = [
            { name: "张三", age: 20, sex: "男" },
            { name: "李四", age: 22, sex: "女" }, 
            { name: "王五", age: 21, sex: "男" },
            { name: "王小六", age: 23, sex: "男" }
            ];
            var htmlstr = "<ul>";
            for(var i=0;i<arr.length;i++){
                // console.log(arr[i])  //   { name: "张三", age: 20, sex: "男" }
                htmlstr += `<li style='background:red'>姓名是${arr[i].name};年龄是 ${arr[i].age} 性别是${arr[i].sex}</li>`;
            }

            htmlstr += "</ul>";

            contanerEle.innerHTML = htmlstr;


        }





    </script>
</body>

</html>